Pump.



specification.

rinus menace. j

To all whom t mag/.concern Be it known that I, JOHN L. LATTAa citizen of the United States, residing at Hickory, in the county of Catawba and State of North Carolina, have invented a new and usefulPump, of which ,the following is a' TheI present matic displacement pumps.

` `It is the object of the .inventiontopro-- vide a novel and improved pump'ef such 4 -construction and' operation that the water canbe displaced by`a pressure fluid, such as compressed air, andv raised/ the ldesired means, pressure 'fluid inlet and outlet means,

and novel means forgcontrolling the flow of inder isI alternately filled and discharged i with the 1iquid,ihe.1iquid being inieimiitently displaced from. ythe cylinder by. the pressure fluid. It is also the object of the invention to. provide a pneumatic displacement pump which is comparatively simple, compact and inexpensivein-constructlom whlch 1s improved generally in its construction and details, and

which will perform'its office. in a thoroughly practical and efficacious manner.

With the foregoing and other objects in .view which will appear as the description' proceeds, the invention resides in the combination and arrangement of parts-and in the details of construction hereinafter described and claimed7 it being understood that changes in the precise embodiment of the invention herein disclosed can lie-made withinthe scope ofl what is claimed without departing from the spirit of the invention..

The invention is illustrated in the accom- Palyng drawing, wherein Figure 1- 1s a vertical section of the pump, taken on the line 1-41 of Fig. 3, portions being broken away.

liig. 2 is'an upper 'end view of the pump.

Fig. 3 is a cross section taken on the-line- 3--3 of Fig. 1.

barrel' 1 providing a cap 2 1s secured in any suitable manner upon invention appertains 'to' pumps, and relates more especlally to pneuf Specication of Letters Patent. Pawn/mtg@ July 3" 119170 Application led May 24, 1916. Serial No. 99,578. n n i i l f i. i Y

' Joan L. LATTA, or HICKORY, ivonrn'oomna.

adapt the pump to various conditions and clrcumstances.

The Pumpembodies a vertical cylinder or water chamber, Vand a the upper end'of the cylinder l and is provided with an upstanding head 3. .The lowery lend of thecylinder luis closed by a cap 4 provided with a central upstanding pin or 65 tures 6 surrounding the stud 7 1s slidable upon lthe stud 5 to provide 'fa Istud 5, andwith water or liquid inlet aper- 5. A disk valve check valve-permitting ofl the inflow of' liquid, but liquid, through the apertures 6'. The upward movement of the valve 7 is limited by a nut 8 or other stop carried by the-stud .5. When the valve 7 gravitates onto the cap 4,

`it covers the apertures .6, to prevent the escape of water or other liquid fromthe cyl- 'inder through the apertures 6. i the pressure fiuid, whereby the barrel or cyl- The head is provided with a vertical bore 9 provlding a pressure fluid outlet, and said head has a counterbore or recess 10 at the .lower end of the bore 9.V A pressure preventing thel outflow of v phere. A depending tube 12 has its upper end engaged with the head 3 to communicate with the lower end of the bere 9, and proi jects downwardly centrally within the recess 10, the lower end of the tube 12 providing a valve seat 13. Thepressure lfluid, when thel end of the tube 12 1s uncovered, can pass to the atmosphere'from the cylinder 1 by way of the tube 12, b ore 9 and pipe 11.'

A vertical tubular housing 14 has its Aup-l per en d projecting loosely within the recess 10 around the tube 12, and acollar 15 is secured or fitted tightly within the upper end of the housing 14 and is slidable upon thelOG tube 12. A coiled wire expansion spring 16 surrounds the tube 12 and its upperend secured to the collar 15, said spring 16 being disposed within the housing 14 andbeing of `such a length, that when the housing-14 is 1,05

raised, the lower end of the spring 16 moves slightly above the valve seat 13.

Disposed loosely within the housing 14 is i an -upper resilient buoyant ball valve 17 seatable upwardly 'against the seat 13 to close the end ofthe tube 12, and the housing 14 is provided With air apertures 18 therein adjacent Y -ithe end ofthe tube 12, orinear the upper end of the housing. A second resilient buoyant ball valve is disposedv within the housing 14 is rovided with water apertures 21 therein adJacent its lower end. The valve 20 is seatable upon `an annular valve seat 19 engaged within. the lower end `of the housing 14. The housing 14 is movable vertically or longitudinally of itself to control the discharge of the pressure fluid from the cylinder. y

The valve seat 19 is provided with a depending tubular extension 22 provided with opposite leather cups 23 or other packing slidable snugly within an upstanding cylinder 24 and providing a piston working therein. The lower end of the cylinder 24 is attached to a horizontal coupling 25 disposed within the cylinder 1 near the lower end thereof, and said coupling -25 has a passage 26, one end of which communicates with the lowerend of the cylinder 24, and the other end of which communicates with the lower end of atube or pipe 27 which is attachedto the coupling 25. The upper end of the pipe 27 is attached to the head 3 to communicate with a discharge passage 28 thereof. A dischar e or eduction pipe 29 for the water or ot er liquid is attached to the head 3 to communicate with the passage 28, and

can extend to the point where it .is desired to discharge the liquid when elevated.

A disk valve 30 is disposed loosely within the cylinder 24 and is seatable upwardly against the yextension 22 which provides a seat for said valve 30, the valve 30 having an upstanding stem 31 slidable in a spider' or guide 32, with which the extension 22 is provided. The valve '30 is raised under the influence of aspiral spring 33 disposed within the cylinder 24 and confined between the coupling 25 and the confronting facel of the valve 30.

' The head 3 is furtherprovided with a vertical bore 34 providing a pressure fluid inlet, the lower end of a pressure fluid supply pipe 35 being engaged with the head 3 to communicate with the upper end of the bore 34. The head 3 has a passage 36 extending from the recess 10 to the-bore 34 between the ends of said bore, and the head has a passage 37 extending from the lower end of the bore 34 and communicating with the upper end of the chamber within the cylinder. A

spool valve 38 is slidable within the bore 34,

being slightly loose, to permit of a slight but not excessive leakage of air past said valve. VThe valve 38 is provided with an annular groove 39 between its ends adapted to register with the passage 36, and the valve has a passage 40 extending from its upper end to the groove 39, while the lower end of the valve is closed. The valve 38 is raised yieldably under the influence of a coiled expansion spring 41 seated upon the lower end below the valve 17, and said housing of the bore 34 and supporting said valve,

whereby to' restore it to normal position arterl water in filling the housing 14, will float the valves and carry them upwardly until the valve 17 is seated against the lower end of the tube 12, thereby preventing the further escape of air from the cylinder by way of the tube 12, bore 9 and pipe 11. -Now, if air under pressureor other pressure fluid is ad mitted into the cylinder, the air flowing from the pipe 35 into the bore 34 and thence through the passage 40, groove 39, passage 36 and recess 10 into the upper end of the cylinder -1. The compressed air will there fore :torce the water downwardly within the cylinder through the apertures 21 of the housing 14 into the lower end of said housing and thence through the valve seat 19 into the cylinder 24. From the cylinder 24,

thewater is forced through the passage 26, pip'e 27, passage 28 and pipe v29 to the point of discharge, the water being displaced by the air, and being elevated thereby. VThe air in flowing through the passage 37 4into thevlower end of the bore 34, will equalize the pressure upon the opposite en ds of the vvalve 38, thus maintaining `said valve in normal position. lVhen 'the water is dis' charged down to the level of the valveseat 19, the discharge of water is arrested, and after they valve 20 seats'the air pressure in the cylinder is reduced as will presently appear. During the time that the water is being ejected from the cylinder, the valve 17 is held seated by the air pressure, but the .l

valve 2O will move downwardly with the level of the water, so that when the level of.

the water reaches the seat 19, the valve 20 will seat thereon, thereby preventing the through the water outlet conduit. Consequently, the unbalanced air pressure inthe .cylinder 1 upon the housing 14 will force the. piston 23 downwardly in the cylinder 24 against the static pressure of the water in pipe 27, and thehousing 14 in being move(` further escape of water or the escape of air v downwardly will move the upper end of the expansion spring 16 downwardly, thereby bringing said spring under compression upon the valve 17. The valve 17 is held seated bythe air pressure, until the housing 1.4 is moved downwardly a sufficient extent to bring the spring 16 under such tension that i Lic it overcomes the air pressure suddenly, and

the spring 16 in expanding by a-sharp movement, serves to throwv the valve 17 downwardly with considerable force, beyondmosphere. At the moment that the valve 17 is thrown from its seat, so that there is a sudden exit of air from the cylinder, the -air pressure in the passage 37 andilower end of the bore 34 is suddenly relieved, whereby the-live air pressure above the valve 38, will force said valve downwardl against the tension of the .spring 41, whereby the upper portion of the valve 38 will close the passage 36, thereby momentarily preventing the inflow of air into the, cylinder,

during the time that the air is being discharged.4 This prevents a wastage of air, s and also facilitates'the operation of thev pump. The valve 38 being moved downwardly will be held in this position for a cylinder to raise the valve 17 against its seat for a new operation. In order to withdraw the spring 16 from the seat 13, to allow the -valve 17 to seat, the column of water within the water discharge conduit will, assisted by the spring 33, seat the valve 30 against the extension 22, and the weight of the column of water will raise the iston 23 and housing 14, thus lifting the spring 16 to normal position withits lower terminal slightly above the seat 13. During the seating of the valve 17, the spring 41 assisted by the leakage of air past the valve 38, will cause the valve 38 to be gradually moved back to normal position, and as soon as the valve 17 is seated, the operation is repeated. rlhe valve 38 not only prevents the waste of air during the interim ofthe exhaust of airl from the cylinder, but also permits-of the freer flow of water into the cylinder.- lt will be noted that the upper end of the valve 38 is sub` jected to live air pressure at all times, whereas when the valve 17 is unseated, the cylinder pressure being relieved, will relieve the pressure against the lower end of the valve 38, whereby said valve is moved downwardly as above indicated. If there were not a slight leakage of the air past the valve 38, it would be held in displaced position, so that this leakage'is essential, to permit the valve 38 to be gradually returned to normal position by the spring 41 in order that the f live air willagain be delivered into the cylinder at about the time the valve 17 is seated. This leakage of air past the valve 38 can be provided by providing a slightly loose inmomentarily,

stead of a tight vfit between the valve 38'and the walls of the bore 34, allowing a minute leakage of air.

,outlet, means operable for automatically closing the pressure fluid outlet when'the liquid level rises to a predetermined point in said chamber and adapted to be held in 'closed position by pressure fluid, and means operable for moving said means to open position out of range of the pressure fluid flowing through the pressure'fluid outlet when the liquid has been forced from said chamber through the liquid outlet. Y

2. A pump embodying a chamber -having a check-valved liquid inlet, a pressure fluid 'inlet and a pressure -fluid outlet, a short time, the water again flowing intothe valve for closing the pressure fluid outlet,

yielding means having a liquid outlet and adapted to unseat said valve, and means for closing said liquid outlet when the liquid has been forced from the chamber therethrough.

3. A pump embodying a chamber having a check-valved liquid inlet, a pressure fluid inlet, a liquid outlet and a pressure fluid outlet, means for closing the pressure fluid outlet, a movable member having a valve seat through which the liquid flows to the liquid outlet, a buoyant valve seatable upon said seat when the liquid has been forced from the chamber through the liquid outlet,

said member being actuated by the pressure -seatable upon said seat, and lmeans carried by Said member for unseating the first 'A mentioned valve when said member is moved by the pressure fluid.

5. A pump embodying a chamber having a check-valved liquid inlet, a pressure fluid inlet, a liquid outletand a pressure fluid outlet, means for closing the pressure fluid outlet, a cylinder communicating with the liquid outlet and from which the liquid flows to saidoutlet, a housing having a piston working in said cylinder and valve seats, a valve seatable upwardly against one of said seats; a buoyant valve within the housing seatable downwardly against the other of said seats, said housing when' moved by the pressure fluid serving .to move the aforesaid means'to-open position.

` 6. A pump embodying a chamber having l -a check-valved liquid inlet, a. pressure fluid inlet, a liquid outlet and a pressure fluid l, outlet, a cylinder communicating with the liquid outletl and from which the liquid flows to said outlet, a housing having a 'piston working in said cylinder and valve seats, a valve seatable upwardly against one of said seats,.a buoyant valve within the housing seatable downwardly upon the other throw it from its seat.

of saidlseats, and a valve for closing the pressure fluid outlet and unseated when the housing is moved by the pressure fluid.

' 7. A pump embodying a chamber having a check-valved liquid inlet, a pressure fluid inlet, aliquid outlet and a pressure fluid' outlet, a valve for closing the pressure lluid outlet, and means for unseating said valve whennthe liquid has been forced from the chamber through the liquid outlet,` the last mentioned means including -spring means adapted to berbrought under tension for unseating said valve by a quick movement to 8. AA pump embodyin a chamber having a check-valved liquid inet, a Apressure fluid inlet, a liquid outlet and a pressure fluid outlet, means for closing the pressure fluid outlet, -a member through which the liquidilows from the chamber to the liquid outlet, a second member slidably engaging the I aforesaid member and having a valve seat, a

buoyant valve seatable upon said seat, the lsecond mentionedmember being moved'by the pressure fluid when said valve is seated, and the second mentioned member having means for moving the aforesaid means to open position when the second mentioned member is moved by the pressure fluid.

' 9. A pump embodying a chamber having a check-valved liquid inlet,l a pressure fluid `inlet, a liquid outlet anda pressure fluid outlet,:a valve for closing the pressure fluid outlet, a member throughv which the liquid v flows. from the chamber to the liquid outlet, '-a .second member slidably engaging the aforesaid member and having a valve seat, a

buoyant valve seatable upon said seat, thesecond member being moved .by the pres-. v sure fluid when the second mentioned valve is seated, and spring means movable with `the second mentioned member and brought under tension to throw the first mentioned valve from its seat when the second mentioned member is operated by the pressure 1. fluid.

10. A pump having a check-valved liquid inlet, an upper pressure fluid inlet, a liquid ant valve within. the housing seatable downwardly against the other of said seats, a second buoyant valvewithin the housing seatable upwardly against the first mentioned seat, and a coiled spring surrounding said .1 tube and having its upper end attached to the I y 1 housing, said spring being seatable upon thesecond mentioned buoyantvalve when the housing is lowered, to throw said valvev fromits seat.

11. A pump' embodying a chamber having i a check-valved inlet, a pressure fluid inlet, a

liquid outlet and a pressure fluid outlet, s 'means for closmg the pressure fluid outlet,

means operated by the pressure fluid for moving said means'to open position when l the liquid has been forced from the chamber through the liquid outlet, and means operated by the pressure fluid for momentarily j shutting oil" the flow of pressure fluid from its inlet to the chamber during the interim, .of vpressure fluid' discharge after the firstmentioned means is moved to open position. 12. A,pump embodying a chamber having ico 'a check-valved liquid inlet, a pressure fluid inlet, a liquid outlet and a pressure fluid outlet, means for closing the pressure fluid vout-` l let, pressure fluid operated means for moving said means to open position when the liquid has been forced from thev -chamber through the liquid outlet,v anda pressure fluidoperated valve' for the pressure fluid inlet operable to momentarily shut oil' the flow of pressure fluid into said'chamber due to a reduction in the pressure in said ch'am-l to open position. 'v

13. A pump embodying a chamber having ber after the first mentioned means is moved a checlr-valved liquid inlet, a pressure fluid inlet, a liquid outlet and a pressure'llud outlet, means for closing the pressure fluid outlet, vvpressure fluid operated y means for moving said means to open position when the liquid has been forced from the chamber through the liquid outlet, and a controlling valve for the pressure fluid inlet and sub? jected at opposite ends to live and chamber pressures whereby the valveisno'rmally held 1n open position, said valve being moved to closed position by the pressure fluid due to a reduction in pressure in said chamber by the movement of the first mentioned means to open position.

14. A pump embodying a chamber having a eheck-valved liquid inlet and a head, liquid outlet means, pressure fluid outlet means, means for closing the pressure fluid outlet means, means for moving said closing means to open position when the liquid has been forced from the chamber through the liquid outlet means, said head having a bore one end of which provides a pressure fluid inlet, the other end of the bore being in communication with lsaid` chamber, said head having a passage communicating with said chamber and with said bore between `the ends of said bore, and a spring pressed valve within said bore having means for establishing communication between said passage and the inlet end of said bore, said valve when moved by live pressure due to a reduction in pressure in said Chamber, momentarily closing said passage.

- 15. A pump embodying a chamber having a head. and a check-valved liquid inlet, said head having a liquid outlet and a pressure fluid outlet, means for closing the pressure fluid outlet, means for moving said `means ,to open position when the' liquid has been forced from the chamber through the liquid outlet, said head having a vertical bore, the

upper end of which rovides a pressure Huidv inlet, said head having a passage extending from the lower end of said bore to sai chamber and having a second passage communieating'with the chamber and with said bore between the ends thereof, a spool valve slidable loosely within said bore and having a groove to register with the second passage and the passage extending from its upper end to said groove, and a spring seated within said bore for supporting said valve.

16. A pump embodying a chamber having a cheolr-valved liquid inlet, a pressure fluid inlet and a pressure fluid outlet, yieldable means having a liquid outlet, a valve for automatically closing the pressure fluid outlet when the liquid level rises to a predetermined point in said chamber and adapted to be held in closed position by pressure' Huid, a valve for closing the liquid outlet when the liquid level is lowered to a point near the liquid outlet, and means operated by said yieldable means for moving the first mentioned valve to open position out of range of the pressure uid flowing throu h the pressure fluid outletwhen the secon mentioned valve closes the liquid outlet, said yieldable means being movable by pressure fluid when the liquid outlet is closed.

In testimony that ll claim the foregoing as my own, I have hereto 4aXed my signa` E. A. Maru, H. A. Larra.. 

